Gear-cutting machine



May '22, 1923. 1 1,456,240

F, w. JURY GEAR CUTTING MACHINE Filed'j'June 9, 1921' a Sheets$heet 1INVENTOR. -Fr unkW-Jury ATTORNEYS.

May 22, 1923.

F. W. JURY I GEAR CUTTING MACHINE s sheets-sheet 2 Filed June 9, 1921INVENTOR.

/ fill/i ATTORNEYS May 22, 1923. 1,456,240 F. w. quRY GEAR CUTTINGMACHINE Fiied June 9, 1921 e Sheets-Sheet s INVENTOR. F1" finkw-durys ATTORNEYS.

m 5 4 MN 4 S I 1 w aw WM fa e z z 000.. E N1 V .R m mi N 0 V n m @m F wR mm May 22, 1923.

INVENTOR. I Frc1nkW JUr' BY ATTORNEYS. I

Patented May 22, 1923.

FRANK WARDENJUEY, OF MILW'AUKEE,WISCONSIN;

GEAR-CUTTING MACHINE.

Application filed June ,9,

To all whom may concern: I

Be it known that I, FRANK WARDEN JURY, a subject of Great Britain, andresident of Milwaukee, in the county of Milwaukee and State ofVisconsin, have invented certain new and useful Improvements in GearCu tting Machines; and I do hereby declare that the following is a full,clear, and exact description thereof.

My invention refers to machines for cut ting spur gears, spiral anddouble helical or herring-bone gears.

The primary object of my invention is to cut a double helical gear,wherein the center gap is eliminated to thereby reduce the face of thegear, without diminishing; strength and to thus increase the strength ofgear teeth of a predetermined width or face.

Other objects of my invention are:

To provide means whereby the cutting of gears of this general type arematerially simplified and the cycle of operation expedited. due to thefact, that the dividing-or indexing motion is accomplished during thecutting of the teeth.

To provide a pair of cutters of the rack type, disposed at oppositeangles, andadapted to reciprocate alternately in a cutting operationtoward the center of the blank which is being rotated, whereby onecutter operates to rough out the tooth from the peripheral edge,directed to the center, and the other cutter thereafter comes intoaction to rough out the succeeding tooth, in such manner that thecompleted herring-bone gear is sharply defined at its apex, by reason ofthe cutters working sharply up to the line of ra-' diation. I

To provide alternately operative cutters which travel upon an angleslightly less than of the predetermined angle of the helical teeth,bearing in mind that the periphery of the blank is being rolled duringeach cutting operation, which movement is trans verse to the line oftravel of the cutter. This variation in angle is for the purpose ofaiding in properly generating the teeth, and for the further purpose ofindexing, that is to say, properly positioning the blank after each cutto be ready for the next tooth space or cut.

To provide an automatic machine having alternately reciprocativeangularly disposed cutters, arranged to cut or rough out the gears in asuccession of'series of uniform cuts, from the top to the base of thegear,

1821. Serial No. 476,188.

will develop upon the faces 'of the roughlycut teeth. I

To provide a gear cutting machine, wherein a continuous rotative gearblank is open ated upon by a pair of alternativelyreciprocativerack-cutters, having an ularly disposed guides adapted to direct thecutters upon the surface of the blank transversely thereof, and at aslightly less angle than the an le of the teeth to be cut, whereby eachcut is uniform throughout, due to the rolling motion which issynchronized with the movements of the cutters, together with means forfeeding the cutters towardthe face of the blank a predetermineddistance" during each revolution thereof, whereby a complete series ofteeth are cut and roughly generated, in a successional step, there beingalso provision for thereafter generating the teeth by bringing intoaction anindependent tangential movement of the cutters with relation tothe blank, said movement being in the opposite direction of travel tothat of the blank. r 1

With the above and other minor objects in view, the invention consistsin certain peculiarities of construction, and combination of parts, asare'hereinafter set forth with reference to the accompanying drawlugsand subsequently claimed: 7

in the drawings: I I p Figure 1 represents a side elevation of a gearcuttin pliflcation of my invention.

Figure 2 an end view of the same, showing a gear blank mounted inposition for operation.

Figure 3 is a sectional view looking in the same direction, the sectionbeing indicated by line 33 of Figure 1.

Figure i is a fragmentary side elevation of certain of the" workingparts diagrammatically expressed and with certain parts in section tomore clearly illustrate struc tural features, the view as a whole, beingtaken as looking toward the side of the o machine, embodying one e Xem-1, with the tonize the marily employed for imparting movement to gearcutting tools. 7

Figure 7 is a detailed rear of the train of gears, whereby motion isimpar from the reciprocative rack to feed mechanism. t

Figure 8 is a detailed plan view, illustrating one of the rack-teethcutters, the parts being in section to show cer ain details ofconstruction, the other parts in dotted lines to indicate the connectionbetween the rack cutters, the horizontally reciprocative rack shown infull lines in Figure 6.

Figure 9 is a detailed bottom faced view of a cam track web forcontrolling the lift of the raclecutters from their idle stroke.

Figure 10 is a detailed plan *lew illustrating a pawl and ratchet teedmechanism and knock-out tappet.

Figure 11 is a detailed planview, partly in section, illustrating thefeed gear connection for imparting tangential movement to therack-cutters.

Figure 12 is a diagrammatic race view, with a fragment of the blankassociated with the rack-tooth cutter, showing particularly toedifference in angle between the travel of the cutters and the angle or"the herring-bone gear developed upon the periphery of said blank, and

Figure 13 is a diagraizaimatic magnif ed View, of a tooth showing aseries of straight cuts from its crown to base, which are more or lesspolygonal in their contour.

Referring by characters to the drawings 1 represents a bed having slirably mounted thereon a housing 2, which housing carries a motor 3 thatis i ar drive connection wit-ha shaft 4: journaled in the housing andwhich carries a disk l at its forward end, having a crank pin 5extending therefrom, The cranlr pin engages a vertically disposedchannel in a reciprocatire rackplate 6, as best shown in F gures [111C6.

, The rack-plate is mounted and guided in a slot 7 formed byvcrosspieces constituting part of the end wall of the housing, and it isheld against lateral play by two series of oppositely disposed guideshoes 8, which project from the rack-plate and straddle the cross-piecesof the frame members.

The rack-plate is formed with two opposite series of gear teeth 9, thatmesh with pinions 59 secured to the shafts 10, which the sectionstrictly assura reverse motion of the rack-plate, the lower wheel 10will be positively rotated in the direction of the arrow, whereby anintermittent rotary motion is imparted to an intermediate gear wheel 12,as indicated by the arrow, due to intermeshing engagement of the trainof gears. The interniittent rotation oi the gear wheel 12 constantly inthe same "direction, imparts movement to a counter-shalt 13, throughbeveled gear connections 13 from the gear wheel 12, is being understoodthat the gear wheel 12 and its associated beveledgear are looselymounted upon a stud 14:, which is carried by the housing.

The counter-shaft 13 which is also suitably journaled in the rousing,iinpartsdrive to a feed shaft 15 through beveled gears 13", 18", therear end of which feed shaft is journaled in a bracket extending fromthe housing, and its outer end is suitably journaled in bearings 16extending from the bed 1, as best shown in Figure 1 The feed shaft 15 isheld against endwise movement, and its rear end is in splined unionwithwthe beveled gear 13". Hence when the housing is moved toward thegear blank (to be hereinafter described) thedriving connection betweenthe shafts 13 and 15 is maintained, due to the in ct that the beveled18" is capable of longitudinal movement upon the shaft 15. g

The shaft 15 is formed in independent sections, as best shown in Figuret, the same being connected. by a differential ear 17. The forwardsection 15 ot the 2d shaft, carries a spur-gear 18 which meshe with thespur gear 18 through-an into mediate gear 18 (as best shown in Figure 2)that imparts motion to a counteushal't The counter-shaft carries a worm19 that meshes with the worm wheel 20 secured to a blank rotating; shait 21. The shaft 21 is journaled in suit-able bearings 22, 22 thatextend from the base, as best shown in Figure 2. it gear blank 23 ismounted upon the shaft 21, and locked to rotate therewith.

The spur-gear element 17 ot the differential, is normally held againstrotation by feed mechanism, to be hereinafter described. Hence, when thefeed shaft section 15 is rotated in the direction of the arrows, (Figure4-), it will transmit motion to the feed shaft section 15 in areverseddirection and at the same speed, due to the beveled gear drivingconnections of the differential gear elements, between the independentshaft sections.

Thus it will be seen that motion from the main shaft 1 is maintained andtransmitted throughout the machine to the blank 23 whereby it is rotatedcontinuously.

A vertically adjustable face-plate 24 is mounted upon the front end ofthe housing 2, the same being formed with oppositely extending andobliquely disposed slots 24-, 2 1". The face-plate has a centrally dis?posed boss 25, which boss is in threaded union with the spindle 25 thatis journaled in a bracket 26, which bracket is carried by the housing 2(as best shown in Figures 3 and 5), whereby the face-plate is verticallyadjusted when the spindle is rotated.

Feed is imparted to the spindle through a transversely disposed shaft.26 that is in beveled gear connection with the spindle, the shaft being.journaled in the brackets 26", and an-outer bracket 27 that dependsfrom the housing exteriorly of the base; It is understood that the shaft26 moves with the housing. The wall of the base 1, is, therefore,slotted to permit such movement. The outer end of the shaft 26, as bestshown in Figure 11, carries a beveled gear wheel 26, which meshes with acorresponding gear wheel 27. that is in splined union with a jack-shaft28. The jack-shaft 28 is journaled in the bearing brackets 16 whichextend from the side wall of the base. When the housing is moved backand fort-l1 from the base, the beveled gear connection between theshafts 26 and 28 is maintained, due to the fact that the bracket 27 isin sliding engagement with the shaft 28 and moves the gear 27 along theshaft 28 to thereby maintain the driving connection between the beveledgear wheel 26 and 27.

As best shown in Figures 3 and 11, the jack-shaft 28 has rigidly securedthereto, a gear wheel 17, which is meshed with the differential orcompensating gear mechanism whereby the gear wheel 17 thereof isnormally held against rotation.

The jack-shaft 28 is normally locked against its tendency to rotatethrough its gear connection 17, 17", with the constantly rotative feedshaft by a pawl and ratchet mechanism, which holds the shaft againstrotation in one direction under normal conditions, and which will feedthe shaft in the opposite direction (as indicated by the arrow in Figure3) under certain conditions.

This pawl and ratchet mechanism comprises a ratchet wheel 29, which isfast on the shaft 28, and a pawl 29 that is mounted upon the rock-armf3Oloose on the shaft. The arm 30 is connected by a link 31 to a lever 31,which lever is fulcrumed to the bracket extending from the base 1.

A coil spring 32 connected tothe lever 31 normally urges'the rock-arm 30in a reverse tendency to the direction of rotation of the shaft 28, andthis spring movement is, under normal conditions, limited by a trip dog33,.which trip dog is pivoted to the bed 1.

The counter-shaft 19 carries a wiper cam 33 which is arranged to engagethe roller 33' mounted upon the lever 31. hen the rock-arm 30, however,is locked by the trip, dog, the lever and its associated anti-frictionroller is held under spring tension out of the path of travel of thewiper cam.

\Vhen the housing is bodily moved upon the base 1, towards the peripheryof the gear blank 23, (by feed mechanism to be hereinafter described) ata predetermined speed, the trip dog is released from its engagement withthe rock-arm 30 by a tappet rod 34, the same being particularly shown inFigures 1 and 10. 1 The tappet rod is adjustably secured at its rear endto the housing, whereby the time of tripping the dog 33 is controlled torelease the rock-arm, for

a feeding movement of the jack-shaft 28.

lVhen the trip of the rock arm takes place,

the spring controlled'lever 31 is shifted to move into the field oftravel of the wiper cam. Thereafter the wiper cam exerts a positiveoscillatory movement upon the le ver 31 in opposition to the spring 32,

whereby the pawl and ratchet connection to the jack-shaft 28, willimpart thereto an intermittent feed movement resulting through its gearconnection with the threaded spindle 25 to cause a downward movement ofrack-cutters 34 carried by the faceplate 24, the said cutters beingmoved in a tangential plane relative to the gear blank and in theopposite direction from the travel of said gear blank.

The housing 2 and its associated rack-cutters are positively fed towardthe face of the gear blankv by a ratchet-bar 35, which is connected tothe housing 2, and guided in the base 1, as best shown in Figures 2, 3and 4. The ratchet bar is positively fed toward the axis of the blank bya spring controlled rock-lever 36 suitably fulcrumed to the bed. As bestshown in Figure 4, the lower end of the rock-lever 36 carries a pawl 36,which pawl normally engages the teeth of the ratchet bar, and the upperend of the rock-lever 36 is provided with an anti-friction roller whichis engaged by atappet lug 37 carried by the blank rotating shaft 21.Hence, with each rotation of the shaft 21, an oscillatory movementisimparted to the rock-lever 36, whereby the housing is positively fedforward a predetermined distance. This feed movement is. provided forthe purpose of feeding the rack-tooth cutters 3 1, intermittently, tothe work, after each cycle of the gear blank,

- each cycle of the blank would be in the form 5 as best shown in i thepin of a spiral. The ratchet-bar 35, in this in stance, carries aknockout finger which finger enga the pawl 36 when the ratchet cuttershave reached the full depth of the tooth whereby ing is stopped, due tothe fact that the pawl is automatically disei'igaged from the ratchetteeth of the bar The rack-cutters 84 are mounted, best shown in l igures3 and 8), in hol ers 38, which holders are pivoted to blocks 59 that areadju stably secured to cross-heads The cross-heads are reciprocativelymounted in daily disposed guides ll, which guides,

igure 3, are of equal anles, radiating from a central line intersectingthe path of travel through the gear blank. Each cross-head has a stud 2extending rearwardly thereof, through the apertures 2%, 24:. Thesestuds, as best shown in F sure 6, engage vertically disgroores 42,formed in the front of Home, as the rack-plate connection posec therack-plate 6. is reciprocated, by its crank disk l. 5, the cross-headsare alternately reciprocated in their guides ll, and when each rack-bar,upon its cutting stroke, (as best shown in Figure reaches central. linewith relation to the path of travel of the blank, it will momentarilystop, preparatory to its return idle stroke. when this stop of therack-cutter takes place. owing to the fact that the driving connectionsbetween the main shaft 4.- and feed of the blank are related, the gearblank will also 1. momentarily. When the rackthe end of its cut-tingstroke it'is designed to be lifted .ry ofthe gear blank. For this p niose provide a one-way gate-cam (as n in l igure 9).' Each gate-camcompr .;e plate s3 secured to its associated uide n The face of theplates are provided .vith rectangular grooves ll, into which grooves apin do is adapted to travel, being extended upwardly from theoscillatory tool holder.

.Vhen'the rack-tooth cutter reaches the end of its cutting stroke, thepin 45 passes beyond the spr' 1;; controlled gate 43", that extendsacross the cam track or groove 41. Hence when the gate closes and therack-cutter starts upon its return idle stroke, it will be deflected orlifted from its engagement with the'gear blank, osci lating inopposition to its spring tension upon its pivot conneckAAp.

the forward feed of the hous In order to maintain the rack-teeth so thatthey will swing outward from the gear blank upon a true horizontalplane, the blocks 39 which carry the oscillatory holders, are alsoadjustably mounted upon the cross-heads 40, the same being swung inadjust-ed positions about the axis of their respected studs and lockedby a suitable bolt and slot connection M3 to the associated cross-heads.

It is understood that all of these details of construction are withinthe knowledge of'a skilled mechanic and form no part of my invention,they being simply illustrated to demonstrate one-way in which themachine can be practically built. It should also be understood thatwhile I have shown various mechanical trip and feed mechanisms, they maye varied within the knowledge of the skilled mechanic.

It will be seen that the blank travels a half tooth for each workingstroke of each cutter across the blank and, therefore, as the cuttersalternately operate upon the blank, such blank will be advanced onetooth for each complete oscillation of the member 6. In this mannercorrect indexing, that is to say, correct advancing of the blank foreach successive working stroke of the cutters, is secured. It is to beunderstood that if it is found desirable, the blank may be advanced twoteeth, three teeth, or any whole member of teeth, for each completeoscillation of the member 6.

It is to be noted that inasmuch as the blank is travelling upwardly,while the cut ter is performing its cutting action and moving in adownwardly slanting direction, it is necessary that the angle of theline of travel of the cutter be less than the angle of the teeth. Inother words,'the cutter mustbe aimed, or pointechat a point, upon theupwardly'travelling face of the blank, in advance of the point at whichthe'inner end of the tooth is located. As shown, in Figure 12, thecutter is pointed, or aimed, at'the point Y in advance ofthe actualterminal or inner end of the tooth. The reason for this, of course, isthat the angularly downward travel of' the cutter and, theupward travelof the cutterand the upward travel of the adjacent side of the blank areadditive and together determine the angle of the teeth. i a I Thisupward travel of the face ofthe blank is necessary both in order to aidin properly generating the teeth and also to position the blankcorrectly for the next, or succeeding cut, thereby securing correctindexing.

From the foregoing it will be seen that when power is applied to themain shaft at, the rack-teeth cutters will be reciprocated back andforth, by the crank disk and through its gear connection the gear-blankwill slowly rotate. When the tool, upon its cutting stroke has reachedthe center line of the blank, it will automatically withdraw from thecut. At the same time the companion tool or rack-cutter will start uponits 1 working stroke to develop the width of the out between the teethof the next blank interstice, that is, while each cutter is upon itsworking stroke, the blank will move approximately one-half tooth, forexample, and consequently the next cut will be upon the opposite face ofthe tooth from that pre viously cut. The rolling motion, due to themovement of the blank and also simultaneous movement of the cuttertransversely, will develop each tooth in a series of fiat planes asillustrated in Figure 13.

After a series of the revolutions of the gear-blank has been affected,to complete the cutting of teeth thereto, the trip dog 33 will be actedupon, by the tappet rod 34. Simultaneously with this tripping acti on,the knockout finger 35 will engage the pawl 36 of the blank feed lever,and hence forward feed of the housing will be stopped, due to the factthat the full depth of the roughly generated teeth have been completed.The feed mechanism tripped by the tappet rod 34: is thus thrown intoaction, whereby the machine is automatically put into condition forenerating the teeth previously rough cut. In this generating operation,the wiper cam 33 will impart rotation to the threaded spindle 25,whereby the face plate carrying the ack-teeth cutters will be graduallymoved downward in the direction of the arrow, as shown in Figure 1,while the blank is moved in the opposite direction where by acompensating action takes place between the rack-cutters and the movingblank to shear off the flats or corners (as indicated at X, Figure 13)developed in the rough cutting, it being understood that in thisgenerating operation the gear blank is rotated in the same manner aspreviously described in connection with the rough cutting of the teeth.

It is to be understood that if it is desired, the head may be moved toits innermost position, with the cutters in their most elevatedposition. The downward feeding may then be commenced and the cutters fedclownwardly in a direction opposite to the upwardly traveling adjacentface of the blank. During this operation, the teeth will be partiallyout completely around the blank at each revolution of the blank, andwhen the cutters have moved to their lowest posi-, tion, the gears willbe completely generated and finished.

\Vhile I have shown and described one exemplification of my invention,in all of its minute details, it is understood that I may vary suchdetails within the scope of mechanical equivalents and an analysis ofthe claims, as they may be herinafter interpreted by those skilled inthe art.

I claim:

1. A gear cut-ting machine comprising a rotatable gear-blank carrier, apair of alternately reciprocative cutters, guides therefor arranged todirect the out upon the blank, transversely thereof and in a lineadvanced relative to the line defining the walls of the teeth, wherebyeach cut across the face i of the blank is uniform throughout.

2. A gear cutting machine comprising a rotatable gear-blank carrier, apair of alternately reciprocative cutters, guides therefor arranged todirect the out upon the blank transversely thereof and in a lineadvanced relative to the line defining the walls. of the teeth, wherebyeach 'cut across the face of the blank is uniform throughout, andrelated driving means between the cutter and blank carrier for impartingmovement to both during a cutting operation.

3. A gear cutting machine comprising a rotatable gear-blank carrier, apair of alternately reciprocative cutters, guides there-. for arrangedto direct the cut upon the blank transversely thereof and in a lineadvanced relative to the line defining the walls of the teeth, wherebyeach cut across the face of the blank is uniform throughout, relateddriving means between the cutter and blank carrier for impartingimovemcnt to both during a cutting operation, means for lifting thecutters after each working stroke, and means for delaying movement ofthe gear-blank carrier during the lift of the cutters from the work.

4. A gear cutting machine comprising a rotary gear-blank carrier,opposed alternately reciprocative rack cutters, angularly disposedguides therefor arranged to-direct the cutters upon the surface of theblank transversely thereof, and in a line advanced relative to the linedefining the walls of the finished teeth, whereby each cut across theface of the blank is uniform throughout, means for reciprocating therack-cutters in synchrony with the movement of the blank carrier in eachrevolution thereof, and means for feeding the cutters toward the face ofthe blank a predetermined depth for each revolution thereof, whereby acom-' plete series 'ofteeth are cut and roughly generated in successivesteps, to completion in a predetermined series. of revolutions of saidblank carrier.

angularly disposed guides diverging from the plane of rotation of theblank, means for alternately feeding the cutters to the center of theperipheral surface of the blank in synchrony with the peripheral speedof the same a pr determined depth for each revolution, whereby saidblank is cut at uniform depth in each cycle and time controlled forfeeding" the rack cutters to a lower depth with relation to theperiphery of the blank after each rotation thereof, whereby a completeseries of teeth are cut and roughly generated in successive steps.

6. A douile helical gear cutting machine comprising a rotary gear-blankcarrier, opposed reciprocal-ire ri1 3l-C11lt6lS, guides thereforarranged at opposite equal angles, diverging from the central plane ofrotation of the blank. the angle of the cutter slide being of adi'lferent degree relative to the angle of the gear teeth to be out uponthe blank, ivherehy each cut across the face of said blank is uniform,means for alternately feeding the cutters to the center line of theblank in synchrony with the peripheral speed thereof, time controlledmeans for feeding the cutters tovvard the face of said blank apreuetermined depth for each rotation thereof, whereby a complete seriesof teeth are cut about the periphery of the blank in a succession ofsteps, and a compensatin feed connection between the blank feeding meansand the rack-cutters for slowly feeding said rack-cutters tangentiallyto and in the opposite direction from the direction of rotation of theblank after the teeth have been completely rough cut to generate thesame, the said compensating feed mechanism being adapted to varytheperipheral speed of the blank to compensate for the movement of therack-cutters in the opposite direction in said generating" operation;

T. A double helical near cutting machine comprising a rotary blankcarrier, singularly disposed alternately reciprocative rack-cuttersadapted to travel transversely of the facecof the blank to its center,and means for feeding; the rack-teeth cutters in a stepbv-step movementtoward the center of the l er each revolution thereof, Wherenit af I vteethare cut to the desired rough dimensions throughout the periphery ofsaid blank in series of rotations thereof. means for eneratins the cutteeth including mechaiism for feeding the raclecutter in the oppoitedirection from movement of the blank, whereby said blank is retardedfrom its normal speed of rotation to compensate for the movement of therack-cutters in a reverse direction.

nesaeao 8. A double helical gear cut-ting machine comprising" rex'oluble blank carrier, angularly disposed companion rack-cutters, meansfor alternately reciprocating the cutters in synchrony with rollingmotion of the blank, whereby the cutters alternately develop teeth ofthe double helical type in the surface blank, cutting from its outeredge to he center of said blank aseries of helical teeth uninterruptedat their apexes thereof, means for feeding the cutters toward the centerof the blank curing each cycle thereof, whereby the entire series ofteeth are cut and roughly generated, the angular path of travel of thecutters in their operation upon the blank varying slightly from theangle of the teeth developed, Wnereby each cut across the face of theblank from outer edge to its center line is uni form.

9. In a double helical gear cutting ma- .ne comprising a continuouslyrotative r blank carrier, a pair of angularly disthe double helicalgears, comprising a rotary blank carrier a pair of angularly disposedracl-zeil tooth cutters, means for alternately reciprocating the sameacross the face of the blank to its center While said blank is inmotion, whereby a like series of tooth cuts progressive in depth aredeveloped, with each stroke-of the cutters in the cycle of the blanksrota tion, means for feeding the cutters toward the surface of the blanka predetermined distance during each cycle thereof to finally completethe cutting of the entire series of teeth in the rough by a sue cessionof connected flat surfaces, a compensating driving means under'controlof the rotative blank car I r for moving the cutters step-by-step in atangential line of travel, opposite the direction of rotation of saidblank, the compensating means serving to retard the speed of rotation ofthe aforesaid blank carrier to compensate for the reverse movement ofthe cutters, whereby the intersecting" corners of the flat surfaces ofthe teeth are successively smoothed out to generate the series ofpreviously roughed teeth. p

testimony that 1 claim the foregoing I have hereunto set my hand atMilwaukee, in the county of Milwaukee and State of l l isconsin.

FnANK lVARDEN JURY.

wood rack toothed cutters arranged-

